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R
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U
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X
Y
Z
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A
long, soft, cylindrical bodies, divided into rings. Example: earthworms.
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B
the skeleton of porifera can be made of spicules (spikes) or _________, or both
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C
soft, sac-shaped body; aquatic habitat. Example: coral.
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D
the stage for cnidarians where their bodies are umbrella-shaped and they move by contracting their bodies
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E
skeletons of spines and plates; no heads. Examples: sea urchins.
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F
porifera's method of nutrition. They feed on small particles of nutrients suspended in water.
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G
this is like a stomach to a cnidarian; it is connected directly to the mouth
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H
long, flat, soft body. Example: tapeworms.
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I
the type of symmetry that cnidarians have
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J
most cnidarians live in the ocean. While corals and sea anemones live attached to the ocean floor, _________________ float.
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L
soft bodies, sometimes protected by a shell. Examples: octupi and snails.
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M
some vertebrates are _______________ (moving), and others are sessile (stationary)
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N
thin, soft, cylindrical bodies. Example: intestinal worms.
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O
an opening in porifera where water filters out in the feeding process.
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P
simple animals, full of pores, attached to the ocean floor. Example: sponges.
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R
articulated exoskeleton. Examples: spiders, prawns and butterflies.
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S
some vertebrates are motile (moving), and others are ____________ (stationary)
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T
these have stinging cells that allow cnidarians to paralyze their prey
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U
the internal skeleton of porifera is made up of spikes, or ______________-
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V
the largest and most diverse group of animals on the Earth
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X
most vertebrates have ___________________, an external skeleton
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Y
stage of cnidarians where sac-shaped body is surrounded by hard skeleton of calcium carbonate
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Z
invertebrates have a wide range of _____________, from microscopic water fleas to giant squid.